Window attachment.



J. STAVNlZKY.

WINDOW ATTACHMENT.

APPLICATION FILED MAY 2, 191a.

Patented Nov. 12, 1918.

W1 N ESSES ATTOR N EY JOHN 'STAVNIZKY, or SOUTH MANCHESTER, CONNECTICUT.

WINDOW ATTACHMEN To all whom it mayconcem Be it known that I, JOHN STAvNrznr, a citizen. of the United States, residing at South 'Manchester, inthe county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Window.Attachments,- of which the following is a specification,

This invention relates to window attachments, and particularly to means for use in connection with windows for obviating the necessity for thenow generally used win dow cords and weights, having for its primary objectito. generally simplify and improve the construction andoperation of devices of this character as well as to increase the eliiciency of the same. i

A further object of the invention is to provide an attachmentof thecharactermene tioned which may be, readily applied to the window frame and which is equally as readily removed therefrom, which is of extremely simple and inexpensive construction, and which embodies but few separable parts, which may be manufactured at low cost and which will Prove thoroughly practical and efficient in use.

The invention has for a further object to provide a rack and gear connection between the sliding sashes and the window frame, having in connection therewith improved brakingmeans for retarding the movement of the sashes in, one direction, which means is capable of being adjusted when required.

VTith these objects in view, together with others which will appear asthe description proceeds, the invention resides in. the'novel formation, combination and arrangement of parts, allas will'be described more fully hereinafter, illustrated in the drawings, andparticularly pointed out in the claims.

In the drawings Figure 1 is a fragmentary side elevation illustrating the application of a. device constructed in accordance with the invention to a. conventional form of window frame and sash,

Fig. 2 is a horizonal sectional view taken through the frame and sash,

Fig. 3 is a sectional view taken upon line 33 of Fig. 2, and

Fig. 4 is a sectional view taken upon line 44 of Fig. 2.

Referring now more particularly to the drawings, 5 indicates the window frame, having the spaced parallel heads 6 upon one Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed May 2, leis. Serial No. 232,04

face thereof, between which the lower and upper sashes 7 and 8 respectively slide. The vertical stiles of the sliding sashes 7 and 8 are each equipped with rack bars 9.

, Incarrying out the invention,- I employ a suitable casing or frame preferably of boxlike formation, this frame being indicated generally at '10. The frame is setinto the interior face of the vertical side'member of theframe and is flush with the said face, and while in the present instance, I refer only to one of such frames and mechanisms, it will be understood that a frameand mechanism of similar-construction is arranged upon the opposite side of the window frame.

Supported between the vertical side members of the box or casing 10, is a shaft indicated at 11. This shaft has rotatably mounted thereon, a drum 12, havingone end reduced as at 13, and this reduced portion at its outer end is provided with ratchet teeth 14. Thereduced portion of the drum constitutes a bearin' for a gear 15, the said gear having firm y. secured upon the outer face thereof an annular member 16. It will be observed that this annular member is disposed directly over the ratchet teeth 14, and a pawl 17 extends through the annular member and is adapted at its inner extremity to engage the teeth 14. A spring 18 is secured at one end as at 19 to the outer face of the gear l5, and rests at'its free end upon-the outer extremity of the pawl 17. Bythis particular construction, it is obvious thatthe gear when rotated in one direction will; throughthezpa-wl and ratchet arrangement; cause the drum 12 to rotate-therewith but when the gear 15 is rotated in the reverse direction, the pawl 17 will play-idly-ove'r the ratchet teeth.

Secured at one end to a suitable bar or rod 19 extending transversely across the casing 10 is a brake band 20. This brake band extends around the drum 12, and is equipped at its free end with a threaded stem 21 which passes loosely through a suitable opening in a cross bar 22 upon the casing.

A nut 23 is threaded upon the protruding equipped with an idle gear 25. It will be observed that the teeth of the gears 15 and 25 project beyond the casing or frame 10, and are engaged with the rack bars of the parallel sashes 7 and 8.

In applying the improved mechanism to a window, one of such devices is inserted in the vertical side members of the frame at each side thereof. These devices are arranged in the side members of the window frame midway between the upper and lower ends thereof, so that the gears 15 and 25 of the devices are at all times in mesh with the upper and lower sliding sashes. The de vices are so arranged that each of the slidable sashes is engaged at one side with a ratchet gear and at the opposite side with an idle gear, and the brake drums, operating through the ratchet gears, prevent the sashes of their own weight moving downwardly. In lowering either of the sashes, it is necessary that slight downward pressure upon the same be exerted, as the friction between the brake band and drum is sufiicient to hold the weight of the sashes. The sashes, may however, be readily raised, it being i'iecessary to exert only such pressure as is required to lift the sashes. When the sashes move upwardly, the gears rotate in clockwise direction, whereupon the pawls 17 will play idly over the teeth 14 of the ratchet mechanisn'i. hen the sashes move downwardly, however, the pawls 17 engage the ratchet teeth, whereupon a positive connection between the ratchet gears and their respective drums 12 is established. The de gree of pressure exerted by the brake band upon the drum may be regulated by adjusting the nut 1.3.

From the foregoing it is obvious that l have provided a device for the purpose stated, which is of extremely simple construction and which may be readily applied to or removed from the window frame. It is preferred that the bar 22 be arranged within the casing in such position as will enable the same to be readily reached for the purpose of adjusting the nut 23.

The foregoing description and the drawings have reference to what may be considered the preferred or approved form of my invention. It is to be understood that I may make such changes in construction and arrangement and combination of parts, materials, dimensions, etc., as may prove expedient and fall within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

l. The combination with a frame and the sliding sashes thereof; a shaft in said frame, an idle gear on said shaft near one end thereof, a drum rotatably mounted on said shaft, a reduced portion at one end of said drum, a gear rotatably mounted on said reduced portion, ratchet teeth on said reduced portion, a pawl on said last mentioned gear engaged with said teeth, a brake band engaged with said drum, and rack bars on said sashes engaged with said gears.

2. In a device of the class described, the combination with a. window' frame having sliding sashes equipped with rack bars; of a bracket adapted to be inserted in said frame, a shaft carried by said bracket, a drum rotatably mounted on said shaft, a gear carried by said shaft, a pawl and ratchet con uection between said gear and drum; a bar in said bracket, a brake band engaged with said drum, a threaded stem on one end of said band extending loosely through said bar, a nut on said stem, and an idle gear on said shaft, the said gears being in mesh with said rack bars.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN STAVNIZKY.

\V i tnesses VVILLIAM S. HYDE. ROBERT Fame.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

